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Rewrite and refactor C half. No more shared memory! It's fast!

Browse source 
Three C modules:
- tabfs (main thread; talks to FUSE)
- common (tabfs<->ws communication helpers)
- ws (side thread; talks to browser over WebSocket)

It's single-threaded, but I don't think that matters anyway.
This commit is contained in:
Omar Rizwan 2019-02-25 13:02:25 -08:00
parent 90181466bd
commit 784ec83696
9 changed files with 567 additions and 476 deletions
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4
.gitignore vendored Normal file
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@ -0,0 +1,4 @@
.DS_Store
scratch
fs/tabfs
fs/tabfs.dSYM

30
extension/background.js
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@ -69,6 +69,8 @@ function pathComponent(path, i) {
return components[i >= 0 ? i : components.length + i];
}
const debugged = {};
const router = {
"tabs": {
/* "last-focused": {
@ -98,18 +100,24 @@ const router = {
}
},
"tree": {
async open(path) {
const debuggee = {tabId: parseInt(pathComponent(path, -2))};
await new Promise(resolve => chrome.debugger.attach(debuggee, "1.2", resolve));
chrome.debugger.sendCommand(debuggee, "Page.getResourceTree", {}, function(result) {
console.log(result);
});
async opendir(path) {
const tabId = parseInt(pathComponent(path, -2));
if (!debugged[tabId]) {
await new Promise(resolve => chrome.debugger.attach({tabId}, "1.2", resolve));
debugged[tabId] = 0;
}
debugged[tabId] += 1;
return 0;
},
async read(path) {
async readdir(path) {
const tabId = parseInt(pathComponent(path, -2));
if (!debugged[tabId]) throw new UnixError(unix.EIO);
const result = await new Promise(resolve => chrome.debugger.sendCommand({tabId}, "Page.getResourceTree", {}, resolve));
const frameTree = result.frameTree;
return frameTree.resources.map(r => String(r.contentSize));
},
async close(path) {
async releasedir(path) {
return 0;
}
}
}
@ -182,6 +190,7 @@ async function releasedir(path) {
let ws;
async function onmessage(event) {
const req = JSON.parse(event.data);
console.log('req', req);
let response = { op: req.op, error: unix.EIO };
/* console.time(req.op + ':' + req.path);*/
@ -238,6 +247,7 @@ async function onmessage(event) {
/* console.timeEnd(req.op + ':' + req.path);*/
response.id = req.id;
console.log('resp', response);
ws.send(JSON.stringify(response));
};

15
fs/Makefile
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@ -1,4 +1,4 @@
TARGETS = hello
TARGETS = tabfs
# Root for OSXFUSE includes and libraries
OSXFUSE_ROOT = /usr/local
@ -18,12 +18,10 @@ CFLAGS_EXTRA = -Wall -g $(CFLAGS)
LIBS = -losxfuse
.c:
$(CC) $(CFLAGS_OSXFUSE) $(CFLAGS_EXTRA) -o $@ $< $(LIBS)
all: $(TARGETS)
hello: hello.c
tabfs: common.c ws.c tabfs.c
$(CC) $(CFLAGS_OSXFUSE) $(CFLAGS_EXTRA) -o $@ $^ $(LIBS)
clean:
rm -f $(TARGETS) *.o
@ -33,5 +31,8 @@ unmount:
killall -9 hello || true
diskutil unmount force mnt || true
mount: hello
./hello -odirect_io -f mnt
mount: tabfs
./tabfs -odirect_io -s -f mnt
debugmount: tabfs
lldb -- ./tabfs -odirect_io -s -f mnt

62
fs/common.c Normal file
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@ -0,0 +1,62 @@
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/time.h>
#include <stdio.h>
#include <signal.h>
#include "common.h"
static int tabfs_to_ws[2];
static int ws_to_tabfs[2];
void common_init() {
if (pipe(tabfs_to_ws)) exit(1);
if (pipe(ws_to_tabfs)) exit(1);
}
void common_send_tabfs_to_ws(char *request_data) {
write(tabfs_to_ws[1], &request_data, sizeof(request_data));
}
char *common_receive_tabfs_to_ws(fd_set_filler_fn_t filler) {
fd_set read_fds, write_fds, except_fds;
FD_ZERO(&read_fds);
FD_ZERO(&write_fds);
FD_ZERO(&except_fds);
int max_fd = filler(&read_fds, &write_fds, &except_fds);
FD_SET(tabfs_to_ws[0], &read_fds);
if (tabfs_to_ws[0] > max_fd) { max_fd = tabfs_to_ws[0]; }
struct timeval timeout;
timeout.tv_sec = 0;
timeout.tv_usec = 200000;
select(max_fd + 1, &read_fds, &write_fds, &except_fds, &timeout);
if (!FD_ISSET(tabfs_to_ws[0], &read_fds)) {
// We can't read from tabfs_to_ws right now. Could be that it
// timed out, could be that we got a websocket event instead,
// whatever.
return NULL;
}
char *request_data;
read(tabfs_to_ws[0], &request_data, sizeof(request_data));
return request_data;
}
void common_send_ws_to_tabfs(char *response_data) {
write(ws_to_tabfs[1], &response_data, sizeof(response_data));
}
char *common_receive_ws_to_tabfs() {
char *response_data;
read(ws_to_tabfs[0], &response_data, sizeof(response_data));
return response_data;
}

18
fs/common.h Normal file
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@ -0,0 +1,18 @@
#ifndef COMMON_H
#define COMMON_H
#include <sys/types.h>
#define DEBUG(...)
void common_init();
typedef int (*fd_set_filler_fn_t)(fd_set*, fd_set*, fd_set*);
void common_send_tabfs_to_ws(char *request_data);
char *common_receive_tabfs_to_ws(fd_set_filler_fn_t filler);
void common_send_ws_to_tabfs(char *response_data);
char *common_receive_ws_to_tabfs();
#endif

459
fs/hello.c
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@ -1,459 +0,0 @@
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <pthread.h>
#include <fuse.h>
#define WBY_STATIC
#define WBY_IMPLEMENTATION
#define WBY_USE_FIXED_TYPES
#define WBY_USE_ASSERT
#include "mmx/web.h"
#include "cJSON/cJSON.h"
#include "cJSON/cJSON.c"
#define DEBUG(...)
struct wby_server server;
struct wby_con *con = NULL;
pthread_cond_t queue_cv = PTHREAD_COND_INITIALIZER;
pthread_mutex_t queue_mutex = PTHREAD_MUTEX_INITIALIZER;
enum request_response_state {
EMPTY = 0,
SEND_REQUEST,
RECEIVE_RESPONSE,
HANDLE_RESPONSE
};
struct request_response {
enum request_response_state state;
char *request;
cJSON *response;
clock_t start;
};
#define REQUEST_RESPONSE_QUEUE_SIZE 128
typedef int request_id;
struct request_response queue[REQUEST_RESPONSE_QUEUE_SIZE];
static request_id enqueue_request(cJSON *req) {
pthread_mutex_lock(&queue_mutex);
// Look for the first free slot.
request_id id;
for (id = 0; id < REQUEST_RESPONSE_QUEUE_SIZE; id++) {
if (queue[id].state == EMPTY) break;
}
if (id >= REQUEST_RESPONSE_QUEUE_SIZE) {
printf("Request-response queue is full!\n");
exit(1);
}
cJSON_AddNumberToObject(req, "id", id);
queue[id].state = SEND_REQUEST;
queue[id].request = cJSON_Print(req);
queue[id].response = NULL;
queue[id].start = clock();
/* printf("%s\n", queue[id].request); */
pthread_cond_signal(&queue_cv);
pthread_mutex_unlock(&queue_mutex);
return id;
}
void send_any_enqueued_requests() {
pthread_mutex_lock(&queue_mutex);
if (con == NULL) goto done;
for (request_id id = 0; id < REQUEST_RESPONSE_QUEUE_SIZE; id++) {
if (queue[id].state == SEND_REQUEST) {
char *request = queue[id].request;
wby_frame_begin(con, WBY_WSOP_TEXT_FRAME);
wby_write(con, request, strlen(request));
wby_frame_end(con);
queue[id].state = RECEIVE_RESPONSE;
free(request);
queue[id].request = NULL;
}
}
done:
pthread_mutex_unlock(&queue_mutex);
}
static cJSON *await_response(request_id id) {
pthread_mutex_lock(&queue_mutex);
while (queue[id].state != HANDLE_RESPONSE) {
pthread_cond_wait(&queue_cv, &queue_mutex);
}
cJSON *resp = queue[id].response;
queue[id].state = EMPTY;
queue[id].response = NULL;
/* printf("Elapsed: %f seconds\n", (double)(clock() - queue[id].start) / CLOCKS_PER_SEC); */
pthread_mutex_unlock(&queue_mutex);
return resp;
}
#define MAKE_REQ(op, req_body, resp_handler) \
do { \
int ret = -1; \
cJSON *req = NULL; \
cJSON *resp = NULL; \
\
pthread_mutex_lock(&queue_mutex); \
int disconnected = (con == NULL); \
pthread_mutex_unlock(&queue_mutex); \
if (disconnected) { ret = -EIO; goto done; } \
\
req = cJSON_CreateObject(); \
cJSON_AddStringToObject(req, "op", op); \
req_body \
\
request_id id = enqueue_request(req); \
resp = await_response(id); \
\
cJSON *error_item = cJSON_GetObjectItemCaseSensitive(resp, "error"); \
if (error_item) { \
ret = -error_item->valueint; \
if (ret != 0) goto done; \
} \
\
ret = -1; \
resp_handler \
\
done: \
if (req != NULL) cJSON_Delete(req); \
if (resp != NULL) cJSON_Delete(resp); \
return ret; \
} while (0)
#define JSON_GET_PROP_INT(lvalue, key) \
do { \
lvalue = cJSON_GetObjectItemCaseSensitive(resp, key)->valueint; \
} while (0)
static int
hello_getattr(const char *path, struct stat *stbuf)
{
memset(stbuf, 0, sizeof(struct stat));
MAKE_REQ("getattr", {
cJSON_AddStringToObject(req, "path", path);
}, {
JSON_GET_PROP_INT(stbuf->st_mode, "st_mode");
JSON_GET_PROP_INT(stbuf->st_nlink, "st_nlink");
JSON_GET_PROP_INT(stbuf->st_size, "st_size");
ret = 0;
});
}
static int
hello_readlink(const char *path, char *buf, size_t size)
{
MAKE_REQ("readlink", {
cJSON_AddStringToObject(req, "path", path);
}, {
cJSON *resp_buf_item = cJSON_GetObjectItemCaseSensitive(resp, "buf");
// FIXME: fix
char *resp_buf = cJSON_GetStringValue(resp_buf_item);
size_t resp_buf_len = strlen(resp_buf);
size = resp_buf_len < size ? resp_buf_len : size;
memcpy(buf, resp_buf, size);
ret = size;
});
}
static int
hello_open(const char *path, struct fuse_file_info *fi)
{
MAKE_REQ("open", {
cJSON_AddStringToObject(req, "path", path);
cJSON_AddNumberToObject(req, "flags", fi->flags);
}, {
cJSON *fh_item = cJSON_GetObjectItemCaseSensitive(resp, "fh");
if (fh_item) fi->fh = fh_item->valueint;
ret = 0;
});
}
static int
hello_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi)
{
MAKE_REQ("read", {
cJSON_AddStringToObject(req, "path", path);
cJSON_AddNumberToObject(req, "size", size);
cJSON_AddNumberToObject(req, "offset", offset);
cJSON_AddNumberToObject(req, "fh", fi->fh);
cJSON_AddNumberToObject(req, "flags", fi->flags);
}, {
cJSON *resp_buf_item = cJSON_GetObjectItemCaseSensitive(resp, "buf");
if (!resp_buf_item) return -EIO;
char *resp_buf = cJSON_GetStringValue(resp_buf_item);
if (!resp_buf) return -EIO;
size_t resp_buf_len = strlen(resp_buf);
size = resp_buf_len < size ? resp_buf_len : size;
memcpy(buf, resp_buf, size);
ret = size;
});
}
static int hello_release(const char *path, struct fuse_file_info *fi) {
MAKE_REQ("release", {
cJSON_AddStringToObject(req, "path", path);
cJSON_AddNumberToObject(req, "fh", fi->fh);
}, {
ret = 0;
});
}
static int
hello_opendir(const char *path, struct fuse_file_info *fi)
{
MAKE_REQ("opendir", {
cJSON_AddStringToObject(req, "path", path);
cJSON_AddNumberToObject(req, "flags", fi->flags);
}, {
cJSON *fh_item = cJSON_GetObjectItemCaseSensitive(resp, "fh");
if (fh_item) fi->fh = fh_item->valueint;
ret = 0;
});
}
static int
hello_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi)
{
// send {op: "readdir", path} to the websocket handler
MAKE_REQ("readdir", {
cJSON_AddStringToObject(req, "path", path);
}, {
cJSON *entries = cJSON_GetObjectItemCaseSensitive(resp, "entries");
cJSON *entry;
cJSON_ArrayForEach(entry, entries) {
filler(buf, cJSON_GetStringValue(entry), NULL, 0);
}
ret = 0;
});
}
static int
hello_releasedir(const char *path, struct fuse_file_info *fi)
{
MAKE_REQ("releasedir", {
cJSON_AddStringToObject(req, "path", path);
cJSON_AddNumberToObject(req, "fh", fi->fh);
}, {
ret = 0;
});
}
static struct fuse_operations hello_filesystem_operations = {
.getattr = hello_getattr, /* To provide size, permissions, etc. */
.readlink = hello_readlink,
.open = hello_open, /* To enforce read-only access. */
.read = hello_read, /* To provide file content. */
.release = hello_release,
.opendir = hello_opendir,
.readdir = hello_readdir, /* To provide directory listing. */
.releasedir = hello_releasedir
};
static int
dispatch(struct wby_con *connection, void *userdata)
{
return 1;
}
static int
websocket_connect(struct wby_con *connection, void *userdata)
{
/* connection bound userdata */
connection->user_data = NULL;
if (0 == strcmp(connection->request.uri, "/"))
return 0;
return 1;
}
static void
websocket_connected(struct wby_con *connection, void *userdata)
{
printf("WebSocket connected\n");
con = connection;
}
static int
websocket_frame(struct wby_con *connection, const struct wby_frame *frame, void *userdata)
{
unsigned char data[131072] = {0};
int i = 0;
DEBUG("WebSocket frame incoming\n");
DEBUG(" Frame OpCode: %d\n", frame->opcode);
DEBUG(" Final frame?: %s\n", (frame->flags & WBY_WSF_FIN) ? "yes" : "no");
DEBUG(" Masked? : %s\n", (frame->flags & WBY_WSF_MASKED) ? "yes" : "no");
DEBUG(" Data Length : %d\n", (int) frame->payload_length);
if ((unsigned long) frame->payload_length > sizeof(data)) {
printf("Data too long!\n");
exit(1);
}
while (i < frame->payload_length) {
unsigned char buffer[16];
int remain = frame->payload_length - i;
size_t read_size = remain > (int) sizeof buffer ? sizeof buffer : (size_t) remain;
size_t k;
DEBUG("%08x ", (int) i);
if (0 != wby_read(connection, buffer, read_size))
break;
for (k = 0; k < read_size; ++k)
DEBUG("%02x ", buffer[k]);
for (k = read_size; k < 16; ++k)
DEBUG(" ");
DEBUG(" | ");
for (k = 0; k < read_size; ++k)
DEBUG("%c", isprint(buffer[k]) ? buffer[k] : '?');
DEBUG("\n");
for (k = 0; k < read_size; ++k)
data[i + k] = buffer[k];
i += (int)read_size;
}
if ((int) strlen((const char *) data) != frame->payload_length) {
printf("Null in data! [%s]\n", data);
}
// Will be freed at the receiver end.
cJSON *resp = cJSON_Parse((const char *) data);
cJSON *id_item = cJSON_GetObjectItemCaseSensitive(resp, "id");
if (id_item == NULL) {
printf("No id in response!\n");
exit(1);
}
request_id id = id_item->valueint;
pthread_mutex_lock(&queue_mutex);
if (queue[id].state != RECEIVE_RESPONSE) {
printf("Got response to request in wrong state!\n");
exit(1);
}
queue[id].state = HANDLE_RESPONSE;
queue[id].response = resp;
pthread_cond_signal(&queue_cv);
pthread_mutex_unlock(&queue_mutex);
return 0;
}
static void
websocket_closed(struct wby_con *connection, void *userdata)
{
printf("WebSocket closed\n");
con = NULL;
}
static void
test_log(const char* text)
{
DEBUG("[debug] %s\n", text);
}
int check_io_demand() {
if (con == NULL) return 1;
for (request_id id = 0; id < REQUEST_RESPONSE_QUEUE_SIZE; id++) {
if (queue[id].state == SEND_REQUEST || queue[id].state == RECEIVE_RESPONSE) {
return 1;
}
}
return 0;
}
void await_io_demand() {
pthread_mutex_lock(&queue_mutex);
while (!check_io_demand()) {
pthread_cond_wait(&queue_cv, &queue_mutex);
}
pthread_mutex_unlock(&queue_mutex);
}
void *websocket_main(void *threadid)
{
void *memory = NULL;
wby_size needed_memory = 0;
struct wby_config config;
memset(&config, 0, sizeof config);
config.userdata = NULL;
config.address = "127.0.0.1";
config.port = 8888;
config.connection_max = 4;
config.request_buffer_size = 2048;
config.io_buffer_size = 8192;
config.log = test_log;
config.dispatch = dispatch;
config.ws_connect = websocket_connect;
config.ws_connected = websocket_connected;
config.ws_frame = websocket_frame;
config.ws_closed = websocket_closed;
wby_init(&server, &config, &needed_memory);
memory = calloc(needed_memory, 1);
wby_start(&server, memory);
printf("Awaiting WebSocket connection from Chrome extension.\n");
for (;;) {
await_io_demand();
send_any_enqueued_requests();
wby_update(&server);
}
wby_stop(&server);
free(memory);
#if defined(_WIN32)
WSACleanup();
#endif
return 0;
}
int
main(int argc, char **argv)
{
pthread_t websocket_thread;
pthread_create(&websocket_thread, NULL, websocket_main, NULL);
return fuse_main(argc, argv, &hello_filesystem_operations, NULL);
}

210
fs/tabfs.c Normal file
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@ -0,0 +1,210 @@
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <pthread.h>
#include <fuse.h>
#include "cJSON/cJSON.h"
#include "cJSON/cJSON.c"
#include "common.h"
#include "ws.h"
static cJSON *send_request_then_await_response(cJSON *req) {
char *request_data = cJSON_Print(req); // Will be freed on ws side.
common_send_tabfs_to_ws(request_data);
char *response_data = common_receive_ws_to_tabfs();
if (response_data == NULL) {
// Connection is dead.
return cJSON_Parse("{ \"error\": 5 }");
}
cJSON *resp = cJSON_Parse((const char *) response_data);
free(response_data);
return resp;
}
#define MAKE_REQ(op, req_body, resp_handler) \
do { \
int ret = -1; \
cJSON *req = NULL; \
cJSON *resp = NULL; \
\
req = cJSON_CreateObject(); \
cJSON_AddStringToObject(req, "op", op); \
req_body \
\
resp = send_request_then_await_response(req); \
\
cJSON *error_item = cJSON_GetObjectItemCaseSensitive(resp, "error"); \
if (error_item) { \
ret = -error_item->valueint; \
if (ret != 0) goto done; \
} \
\
ret = -1; \
resp_handler \
\
done: \
if (req != NULL) cJSON_Delete(req); \
if (resp != NULL) cJSON_Delete(resp); \
return ret; \
} while (0)
#define JSON_GET_PROP_INT(lvalue, key) \
do { \
lvalue = cJSON_GetObjectItemCaseSensitive(resp, key)->valueint; \
} while (0)
static int
tabfs_getattr(const char *path, struct stat *stbuf)
{
memset(stbuf, 0, sizeof(struct stat));
MAKE_REQ("getattr", {
cJSON_AddStringToObject(req, "path", path);
}, {
JSON_GET_PROP_INT(stbuf->st_mode, "st_mode");
JSON_GET_PROP_INT(stbuf->st_nlink, "st_nlink");
JSON_GET_PROP_INT(stbuf->st_size, "st_size");
ret = 0;
});
}
static int
tabfs_readlink(const char *path, char *buf, size_t size)
{
MAKE_REQ("readlink", {
cJSON_AddStringToObject(req, "path", path);
}, {
cJSON *resp_buf_item = cJSON_GetObjectItemCaseSensitive(resp, "buf");
// FIXME: fix
char *resp_buf = cJSON_GetStringValue(resp_buf_item);
size_t resp_buf_len = strlen(resp_buf);
size = resp_buf_len < size ? resp_buf_len : size;
memcpy(buf, resp_buf, size);
ret = size;
});
}
static int
tabfs_open(const char *path, struct fuse_file_info *fi)
{
MAKE_REQ("open", {
cJSON_AddStringToObject(req, "path", path);
cJSON_AddNumberToObject(req, "flags", fi->flags);
}, {
cJSON *fh_item = cJSON_GetObjectItemCaseSensitive(resp, "fh");
if (fh_item) fi->fh = fh_item->valueint;
ret = 0;
});
}
static int
tabfs_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi)
{
MAKE_REQ("read", {
cJSON_AddStringToObject(req, "path", path);
cJSON_AddNumberToObject(req, "size", size);
cJSON_AddNumberToObject(req, "offset", offset);
cJSON_AddNumberToObject(req, "fh", fi->fh);
cJSON_AddNumberToObject(req, "flags", fi->flags);
}, {
cJSON *resp_buf_item = cJSON_GetObjectItemCaseSensitive(resp, "buf");
if (!resp_buf_item) return -EIO;
char *resp_buf = cJSON_GetStringValue(resp_buf_item);
if (!resp_buf) return -EIO;
size_t resp_buf_len = strlen(resp_buf);
size = resp_buf_len < size ? resp_buf_len : size;
memcpy(buf, resp_buf, size);
ret = size;
});
}
static int tabfs_release(const char *path, struct fuse_file_info *fi) {
MAKE_REQ("release", {
cJSON_AddStringToObject(req, "path", path);
cJSON_AddNumberToObject(req, "fh", fi->fh);
}, {
ret = 0;
});
}
static int
tabfs_opendir(const char *path, struct fuse_file_info *fi)
{
MAKE_REQ("opendir", {
cJSON_AddStringToObject(req, "path", path);
cJSON_AddNumberToObject(req, "flags", fi->flags);
}, {
cJSON *fh_item = cJSON_GetObjectItemCaseSensitive(resp, "fh");
if (fh_item) fi->fh = fh_item->valueint;
ret = 0;
});
}
static int
tabfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi)
{
// send {op: "readdir", path} to the websocket handler
MAKE_REQ("readdir", {
cJSON_AddStringToObject(req, "path", path);
}, {
cJSON *entries = cJSON_GetObjectItemCaseSensitive(resp, "entries");
cJSON *entry;
cJSON_ArrayForEach(entry, entries) {
filler(buf, cJSON_GetStringValue(entry), NULL, 0);
}
ret = 0;
});
}
static int
tabfs_releasedir(const char *path, struct fuse_file_info *fi)
{
MAKE_REQ("releasedir", {
cJSON_AddStringToObject(req, "path", path);
cJSON_AddNumberToObject(req, "fh", fi->fh);
}, {
ret = 0;
});
}
static struct fuse_operations tabfs_filesystem_operations = {
.getattr = tabfs_getattr, /* To provide size, permissions, etc. */
.readlink = tabfs_readlink,
.open = tabfs_open, /* To enforce read-only access. */
.read = tabfs_read, /* To provide file content. */
.release = tabfs_release,
.opendir = tabfs_opendir,
.readdir = tabfs_readdir, /* To provide directory listing. */
.releasedir = tabfs_releasedir
};
int
main(int argc, char **argv)
{
common_init();
pthread_t websocket_thread;
pthread_create(&websocket_thread, NULL, websocket_main, NULL);
return fuse_main(argc, argv, &tabfs_filesystem_operations, NULL);
}

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// WebSocket server.
// Side thread that gets spawned.
#define WBY_STATIC
#define WBY_IMPLEMENTATION
#define WBY_USE_FIXED_TYPES
#define WBY_USE_ASSERT
#include "mmx/web.h"
#include "common.h"
static struct wby_server server;
static struct wby_con *con = NULL;
static int fill_fd_set_with_ws_sockets(fd_set *read_fds, fd_set *write_fds, fd_set *except_fds) {
// Based on web.h:1936 (start of wby_update)
int max_fd = 0;
FD_SET(server.socket, read_fds);
FD_SET(server.socket, except_fds);
max_fd = WBY_SOCK(server.socket);
if (con == NULL) { return max_fd; }
struct wby_connection *conn = (struct wby_connection *) con;
wby_socket socket = WBY_SOCK(conn->socket);
FD_SET(socket, read_fds);
FD_SET(socket, except_fds);
if (conn->state == WBY_CON_STATE_SEND_CONTINUE) {
FD_SET(socket, write_fds);
}
if (socket > max_fd) { max_fd = socket; }
return max_fd;
}
static void receive_tabfs_request_then_send_to_browser() {
char *request_data = common_receive_tabfs_to_ws(fill_fd_set_with_ws_sockets);
if (request_data == NULL) {
return;
}
if (con == NULL) {
common_send_ws_to_tabfs(NULL);
return;
}
wby_frame_begin(con, WBY_WSOP_TEXT_FRAME);
wby_write(con, request_data, strlen(request_data));
wby_frame_end(con);
/* pthread_mutex_lock(&queue_mutex); */
/* if (con == NULL) goto done; */
/* for (request_id id = 0; id < REQUEST_RESPONSE_QUEUE_SIZE; id++) { */
/* if (queue[id].state == SEND_REQUEST) { */
/* char *request = queue[id].request; */
/* wby_frame_begin(con, WBY_WSOP_TEXT_FRAME); */
/* wby_write(con, request, strlen(request)); */
/* wby_frame_end(con); */
/* queue[id].state = RECEIVE_RESPONSE; */
/* free(request); */
/* queue[id].request = NULL; */
/* } */
/* } */
/* done: */
/* pthread_mutex_unlock(&queue_mutex); */
}
static int
dispatch(struct wby_con *connection, void *userdata)
{
return 1;
}
static int
websocket_connect(struct wby_con *connection, void *userdata)
{
/* connection bound userdata */
connection->user_data = NULL;
if (0 == strcmp(connection->request.uri, "/"))
return 0;
return 1;
}
static void
websocket_connected(struct wby_con *connection, void *userdata)
{
printf("WebSocket connected\n");
con = connection;
}
#define MAX_DATA_LENGTH 131072
static int
websocket_frame(struct wby_con *connection, const struct wby_frame *frame, void *userdata)
{
unsigned char *data = calloc(1, MAX_DATA_LENGTH); // Will be freed at receiver (tabfs).
int i = 0;
DEBUG("WebSocket frame incoming\n");
DEBUG(" Frame OpCode: %d\n", frame->opcode);
DEBUG(" Final frame?: %s\n", (frame->flags & WBY_WSF_FIN) ? "yes" : "no");
DEBUG(" Masked? : %s\n", (frame->flags & WBY_WSF_MASKED) ? "yes" : "no");
DEBUG(" Data Length : %d\n", (int) frame->payload_length);
if ((unsigned long) frame->payload_length > MAX_DATA_LENGTH) {
printf("Data too long!\n");
exit(1);
}
while (i < frame->payload_length) {
unsigned char buffer[16];
int remain = frame->payload_length - i;
size_t read_size = remain > (int) sizeof buffer ? sizeof buffer : (size_t) remain;
size_t k;
DEBUG("%08x ", (int) i);
if (0 != wby_read(connection, buffer, read_size))
break;
for (k = 0; k < read_size; ++k)
DEBUG("%02x ", buffer[k]);
for (k = read_size; k < 16; ++k)
DEBUG(" ");
DEBUG(" | ");
for (k = 0; k < read_size; ++k)
DEBUG("%c", isprint(buffer[k]) ? buffer[k] : '?');
DEBUG("\n");
for (k = 0; k < read_size; ++k)
data[i + k] = buffer[k];
i += (int)read_size;
}
if ((int) strlen((const char *) data) != frame->payload_length) {
printf("Null in data! [%s]\n", data);
}
common_send_ws_to_tabfs((char *) data);
// Will be freed at the receiver end.
/* cJSON *resp = cJSON_Parse((const char *) data); */
/* cJSON *id_item = cJSON_GetObjectItemCaseSensitive(resp, "id"); */
/* if (id_item == NULL) { */
/* printf("No id in response!\n"); */
/* exit(1); */
/* } */
/* request_id id = id_item->valueint; */
/* pthread_mutex_lock(&queue_mutex); */
/* if (queue[id].state != RECEIVE_RESPONSE) { */
/* printf("Got response to request in wrong state!\n"); */
/* exit(1); */
/* } */
/* queue[id].state = HANDLE_RESPONSE; */
/* queue[id].response = resp; */
/* pthread_cond_signal(&queue_cv); */
/* pthread_mutex_unlock(&queue_mutex); */
return 0;
}
static void
websocket_closed(struct wby_con *connection, void *userdata)
{
printf("WebSocket closed\n");
if (con == connection) con = NULL;
}
static void
test_log(const char* text)
{
DEBUG("[debug] %s\n", text);
}
void await_io_demand_or_timeout() {
/* pthread_mutex_lock(&queue_mutex); */
/* struct timeval now; */
/* gettimeofday(&now, NULL); */
/* struct timespec tsp; */
/* tsp.tv_sec = now.tv_sec; */
/* tsp.tv_nsec = now.tv_usec * 1000; */
/* tsp.tv_nsec += 200 * 1000000; // wait for 200ms max */
/* pthread_cond_timedwait(&queue_cv, &queue_mutex, &tsp); */
/* pthread_mutex_unlock(&queue_mutex); */
}
void *websocket_main(void *threadid)
{
void *memory = NULL;
wby_size needed_memory = 0;
struct wby_config config;
memset(&config, 0, sizeof config);
config.userdata = NULL;
config.address = "127.0.0.1";
config.port = 8888;
config.connection_max = 4;
config.request_buffer_size = 2048;
config.io_buffer_size = 8192;
config.log = test_log;
config.dispatch = dispatch;
config.ws_connect = websocket_connect;
config.ws_connected = websocket_connected;
config.ws_frame = websocket_frame;
config.ws_closed = websocket_closed;
wby_init(&server, &config, &needed_memory);
memory = calloc(needed_memory, 1);
wby_start(&server, memory);
printf("Awaiting WebSocket connection from Chrome extension.\n");
for (;;) {
// FIXME: makes reconnect impossible. :<
/* await_io_demand_or_timeout(); */
receive_tabfs_request_then_send_to_browser();
wby_update(&server); // We receive stuff during this phase.
}
wby_stop(&server);
free(memory);
#if defined(_WIN32)
WSACleanup();
#endif
return 0;
}

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#ifndef WS_H
#define WS_H
void *websocket_main(void *threadid);
#endif